Automatic shuttle changing means for weaving looms



Jan. 3,1950 I E. A. BUTIN 2,493,570

AUTOMATIC SHUTTLE CHANGING MEANS FOR WEAVING LOOMS Filed Dec. 11. 1946 5 Sheets-Sheet 1 Jan. 3, 1950 A. BUTIN 0 AUTOMATIC SHUTTLE CHANGING MEANS FOR wmvme LOOMS Filed Dec, 11, 194av 5 Sheets-Sheet 2 22 Hath rs Jan. 3, 1950 E. A. BUTIN AUTOMATIC SHUTTLE CHANGING. MEANSFQR WEAYING LOOMS Filed Dec. 1 1, 194's 5 Sheets-Sheet 5 E. A. BUTIN Jan. 3, 1950 AUTOMATIC SHUTTLE CHANGING MEANS FOR WEAVING LOOMS 5 Sheets-Sheet 4 Filed Dec. 11, 1946 Jan. 3, 1950 E. A. BUTlN 2,493,570

AUTOMATIC SHUTTLE CHANGING MEANS FOR WEAVING LOOMS Filed Dec. 11, 1946 5 Sheets-Sheet 5 .114 (MW; 2211/ L (Z- %& f/V715 Patented Jan. 3, 1950 AUTOMATIC SHUTTLE CHANGING MEANS FOR WEAVING LOOMS Emile Achille Butin, Lyon, France Application December 11, 1946, Serial No. 715,419

In France December 17, 1945 8 Claims.

My invention has for its object an improved automatic shuttle changing device for weaving looms, which eliminates the drawbacks of the arrangements existing to this day. Said prior arrangements generally fall into two categories, to wit:

(a) Those wherein the change of shuttle is operated during the operation of the loom and which by reason of the speed at which this change is made, produce frequent accidents such as the breaking of the shuttle or of different parts, set in motion with too great a roughness.

(b) Those wherein the loom is stopped during the time required for the changing of the shuttle.

This results in a loss of time and consequently in a reduction of production, requiring an intricate and bulky braking and starting mechanism.

The change of shuttle according to my invention relies on the fact that the box located on the change side serving to receive and start the shuttle plays a useful part only during one-half revolution of the crank-shaft out of two complete revolutions.

A primary object of my invention consists in making use of the three half revolutions during which the shuttle-box does not have any useful function for disengaging it with reference to the batten and holding it in register with a casing containing substitute shuttles which provides thus all the time required for the downward movement inside said box of the next shuttle without any shock or rough treatment. Once this change has been executed, the box resumes its normal cycle of operation as it follows the batten with which it moves in unison up to the next change of shuttle.

This removes the drawbacks of the two systems of shuttle-changing generally used nowadays in weaving looms, and as stated above.

As a matter of fact, the time available for producing a change of shuttle is sufficiently long for it to be possible to execute it smoothly without however the loom itself standing still. At the same time this removes the intricate and bulky means used heretofore for braking and starting again the loom.

On the other hand, the inertia of the moving parts being practically zero, the drive of the loom may be ensured through the usual means of an ordinary loom, i. e. for instance through a belt and a set of loose and fast pulleys.

Moreover the loading of the shuttle-box being executed beyond the extreme rear position of the batten, the front part of the loom remains perfectly free.

According to a further object of my invention, a frame is pivotally secured to an extension of the rocking-shaft of the batten and forms, at its upper part, the box inside which the shuttle is to be engaged, the front wall of this box being pivotally secured to said frame and adapted to move away therefrom at the moment of the change of shuttle so as to receive the next shuttle through the action of levers which engage slopes and the pivoting of which is produced by a cam.

According to a further object of my invention, the engagement and disengagement between the batten and the frame are obtained through the said levers which control at the same time the opening of the box as disclosed.

According to a still further object of my invention, the above frame which rocks round an axis lying in alignment with the axis of reciprocation of the batten and which follows the same during its reciprocation, while allowing its disengagenism comprising the weft-feeler which controls said mechanism.

According to a particular feature of this form of execution, all the parts of the frame producing the various movements required, to wit: the feeling of the cop, the disconnection of the frame with reference to the batten, the feeding of the next shuttle, the release of the shuttle when it is to be started, and also the reverse movements which return said parts into their original position, are ensured by a set of cams all keyed to the same shaft rotating at half the speed of the crank-shaft of the loom; the operation of the said cams in the case of the cams controlling the various movements which are to be made only at the moment of the change of shuttle, is provided by a translational movement of said shaft which places said cams in front of the levers to be controlled thereby. According to a still further feature of my in vention, this translational movement of the shaft is produced by the release through the feeler of a projection which enters the path of the bossof one of the said cams, which forces the latter to recede while producing the desired translational movement.

This manner of applying my invention will be better understood by referring to the accompanying diagrammatic drawings corresponding with the case of a simple stroke loom. It is of course to be understood that it is applicable as well to a and side ofthe whole weaving loom equipped ac- I cording to my invention. i x

Fig. 2 is a perspective view through the rear of the oscillating frame and various members in their non-released position, the batten and eittension thereof being however removed from said perspective view and only the hooks previdedsaid extension being illustrated forgreater clarity of the illustration.

the shuttle locking means.

Fig. 4 shows the sensing member in elevational side view at the moment of the sensing of a shuttle the cop of which isnot yet exhausted. l fFigs. 5; to are diagrams showing in' elje'va tifonal side 'view the succession of movements at thenioment of achan'ge of shuttle.

Figs. 11 to 13are further diagrams illustrating in plan view the relative location of the principal members in three of their positions.

" 14 is a plan View of the open box with its piv ting independent cover. I Fig. 15 is a side elevational view of the same box as seen cross-sectionally through line I5l5 of Fig. 14. shown in the embodiment illustrated, the frame I is provided wi-th'two supports Id pivotally secured-to a's'haft 2 arranged in alignment with the shaft carrying the batten A and forming an extension thereof. 7 V The frame I includes a wall lb and a shoeor 1 step 1e (Fig. 2') defining with another wall 6 a box or Compartment B opening upwardly and I expansibl'e laterally as this wall 6 forms part of an; n'dependeh't frame I pivotally secured at 8 to'the" arms" Id 6f the frame I. isffr'ame l' "carries a shoe or step I0 located This iii-a e I also has two lugs la extending foropening 9. V I

' 'I-h'e batten A of the weaving loom stops at Al KF igs. 11-1 3) and the missing portion corresponds.

to the location of the above mentioned box '13 outlined asshown at 3 so as to form a slope ending with a hook 5; the spacing between said two plates '35 is such that theyfit between lugsja of the frame 'I. This box 3b is moreover positioned vertically in a manner such that it may move over said lugs la and fit to a slight V wall lb of thebox B is provided with openings If and 19 (Figs. 2 and 3). The latter openings Ig serve for the passage of the bosses l3 carried by a plate I3a pivotally secured at I31) tothe rear surface of a plate lb along a line perpendicularto the axis of rotation 2. v V L Theplate 3a isprovided with notches registering with the openings lj'in the wall lb.

"1'5 Fig. 3 is aview similar to Fig. 1 illustrating at the same height as the shoe is of the box B.

I wardly and provided each with a sloping cam tnatshaw's n" its bottom or shoe lc a longitudinal slot Id for the picker stick 0'.

box two transversal plates the'front of which extent underneath the shoe or step. In as it passes I between thezlegs of said frame I as allowed 7 through the bent shape assumed by the iron 4 The frame I carries a shaft I6 that is driven into rotation in the direction of the arrow 1/ at half the speed of the crank-shaft of the loom controlling the batten .A. Its rotation is produced by a chain I I controlling a sliding pinion I1 and as it rotates, said shaft may be shifted axially.

v 0 said shaft I6 are keyed in suitable locations (Fig. 2}) a 7 i A cam l8 acting on a lever 2|. A cam I9 acting on a lever 20. A cam 22 adapted to raise an arm 23. A- cam 24 providingfor a horizontal translational movement of the shaft It in the direction of.

the arrow as.

A locking disc 25 provided with a notch 25a and rotating'adjac'ent'a stud 26 rigidly secured to the frame I.

A cam 21 controlling two levers a rigid with one another and keyed to the spindle 33 connecting themtogether. j

A cam- 28 cooperating with the lever 29., A

A stop 36 serving as a bearing for a spring 3i urging the shaft I6 in a direction opposed to that of the arrow :0.

The spindle 33 carries the following members adapted to rock without being capable of moving longitudinally on it;

The lever 2'! The arm 23 And the lever 29. V

The levers keyed to the spindle 33 end with projections 4a engaging the cam openings 9 provided in the lugs la. A

For actuating the shuttle unitthrough a slot l j in the wall lb and through a slot of the plate I30, I use for engaging the inside of the box 3 a rubber roller}?- carried by a bent rod 48 adapted to rockin the bearing 48a carried by the frame I Fe-3)- M. a

To the rod 48 is keyed a stop 50 that engages another stop 5-l carried by the lever 2i; adapted to freely rock round the spindle Q3. The lever 2| carries a transversal tail end 52 adapted tobe raised by the cam I 8 keyed to the shaft I6.-- This cam acts on the tail end of thelever whatever may bethe position of the shaft I6 which as disclosed hereinabove is capable of being shifted axially. A light spring 53 urges the roller 4'! inside the casing or box B; A stronger spring 5 3 urges thelever it against the plate l3u. carr-ying the bosses I3. A port 55 in the boss I3 and plate I3a provides a passage for the needle 35 of the sensing member (Fig. 4).

The frame I' alsoincludes a'sensingdevice' arranged as fellows (Fig. 4):

A body 56 secured to the frame carries two a-x-les 5] and 58 over which may rock respectively asensing arm 2I3 -and anengaging lever 38. At the upper end of the body 56 is provided a bracket 9 inside which the needle 35 is adapted to move horizontally, said needle carrying at its end an adjustable stop 36, said stop, being urged in the direction of the arrow e by a lightspring 60 sur= rounding it partly. A sliding rod 31 is rigid with the upper axle 38a of the rocking lever 38. Said rod bears slidingly at 31a against the body 55 lever 38 pivotallysecured to the body 56 as disclosed. The lower end of said rocking arm 23 carries a roller 23b adapted to cooperate with the cam 24.

The sensing needle 35 may engage the box B mside which it enters through the opening 35 provided in the boss I3 and its plate |3a.

The spare shuttles 42 are held in a shuttle holder 39 secured permanently and rigidly to the frame of the loom D (Fig. 1) above the frame and in a position such that said holder may lie in vertical alignment with the box B of said frame when the latter is in its rear position. The transfer into said box of a full shuttle 40 is provided by the cradles 3911 (Figs. to the release and control of which are ensured in any known manner, said arrangement not forming part of my invention. This release is obtained through a link- Work 29a connected with the lever 29 cooperating with the cam 28 keyed to the shaft l6 (Fig. 2).

To the wall 6 of the frame I, is moreover suspended through the bracket 10 an independent cover 44 (Figs. 14 and pivotally secured to the rod carried by said bracket 10. The outline of said cover is that of a reversed angle bar and it is submitted to the action of a spring 12 while its nose i3 bears the end of a lever 14 pivotally secured at 15 to a projection 16 on the Wall 6. This projection 16 is rigid with a stop 11 adapted to arrest the empty shuttle that is to be removed.

The operation of the arrangement is as follows:

The loom D operating normally with a shuttle 4| of which the cop carries enough weft thread, the frame 1 closes against the frame through operation of the projections 4a, carried by the levers 4 and located at the upper end of the cam slopes 9 as shown in Figs. 5 and 13. The system of frames and I is then rigid with the batten A and follows its reciprocating movements from front to rear and from rear to front. As a matter of fact, the projections 4a also engage the outer end 3 of the plates rigid with the bent fitting 3a arranged endwise of the batten A. The box B is located as stated in alignment with the batten A, its bottom or shoe |c being flush with the corresponding surface of the batten. The operative shuttle 4| enters the box B and is urged out of it as in the usual looms by the picker stick C.

The shaft l6 urged by its spring 3| occupies the position illustrated in the drawing in Fig. 2 and the cams 24, 21 and 28 move withoutacting on their levers respectively levers '23, 4 and 29. Only the levers 2| and are submitted to the action of their cams I8 and I9 by reason of the length given to their terminal crank pins 52 and 64 and said levers 2| and 20 act respectively on the shuttle unit and on the sensing system at the moment at which the shuttle lies in the easing B as disclosed hereinafter.

The roller 41 normally engages the box B under the action of its spring 53. The stop 50 engaging the stop 5| on the lever 2| prevents the latter from bearing against the boss l3 and prevents the spring 54 from acting efficiently (Fig. 3)

When the shuttle enters the box, it urges outwardly the rubber roller 41 so that the rod 48 rocks slightly and the stop 50 rigid therewith is shifted off the stop 5|. The lever 2| urged by the spring 54 bears then against the free end of the plate |3a the bosses |3 of which are urged with some strength against the shuttle and hold it fast.

At this moment, the crank pin 64 at the end of the lever arm 20 engages the low portion of the camlQ and allows the needleof. the sensing system 35 urged forwards by its spring 60 to engage the opening 55 and the corresponding opening provided for this purpose in the shuttle (Fig. 4).

The needle bears thus slightly on the thread contained in the cop. The thickness of the layer of thread remaining on the tube of the cop does not allow the needle to engage to a sufficient depth for the stop36 to come into engagement with the notch 6| of the rod 31. The arm 2|) is then shifted forward under the action of the cam l9 which as it rotates causes the crank pin 64 of the armv 26 to rise on to the higher portion of the cam. The stop 35 is then urged backwards with the needle 35 that completely disengages the shuttle. The stop 36 slides over the rod 31 without driving it and no release of lever 23 is produced. The rotation of the shaft l6 has so driven the cam B that,..at the moment where the needle of the sensing device has completely disengaged the shuttle, cam l8 raises the lower crank pin 52 on the lever 2| (Fig. 3). The upper part of said lever no longer bears against the plate |3a and as it moves away from it, it tensions the spring 54 and shifts its stop 5! away. The boss l3 presses no longer against the shuttle that is then urged inwardly by the picker stick C. The roller 47 is no longer held by the shuttle and engages again the inside of the box B under the action of the spring 53 while the stop 59 rises and comes into register with the stop 5|. The cam lB that has continued its rotation has left the crank pin 52 of the lever 2| and the latter bears through its stop 5| against the stop 5|! that prevents it from pressing against the boss I3.

When the provision of weft thread on the cop of the shuttle 4| is no longer sufficient, at the moment when the batten is in its operative position as shown at I in Fig. 5, the needle 35 of the sensing mechanism engages to a greater extent inside the shuttle and its stop 35 engages the notch SI of the slider 3'1. The automatic shuttle changing movement is then obtained.

During the first half revolution of the crankshaft of the loom the batten A moves from front, to rear that is from the position I (Fig. 5) to the position II (Fig. 6).

During this movement, the needle of the sensing member is released with reference to the shuttle under the action of the cam l9 (Fig. 2) through the agency of the lever 20 driving also the slider 3'5 that is in its stop engaging position. The hooked. lever 38 (Fig. 4) releases the arm 23 that drops in front of the cam 24 (Figs. 2 and 4). At the same time, the cam It! has released the lever 2| that no longer bears against the boss I3 so as to allow the free starting of the shuttle 4| under the action of the picker stick disclosed hereinabove; the shuttle although it is exhausted retains still enough thread for executing a further reciprocation in the shed. The cam 24 has now moved into contact with the arm 23. cannot move laterally so that the suitably shaped cam 24 providing for translational movement is shifted by the said arm in the direction of the arrow :0 together with the shaft I6 and its cams while compressing the spring 3|. At the moment at which the translation controlling cam 24 engages the arm 23, the notch 25a. of the disc 25 appears in front of the stationary stud 26 so that the disc 25 may enter a position on the other side of the stud 26.

l The shaft 6 as it rotates brings then the solid portion of the disc 25 in front of said stud 26 so that the shaft I6 is held against outward shifting by the disc and the translation controlling This arm cam- 24 no longer operative. Throughvtheacs tio'n':- ofthe translational I movement of J the-:shatt I the Cami-l has come-under the tail end of the lever i; the cam 28 underthetailend of the lever 23 -and the raisingcam 22' underthe trans-. lationcontrolling arm 23 while the cams 'l8'and l remain respectively in contact, the former with the lever 2|: of the shuttle locking=means;-- and the latter with the lever of the sensingmeans: Through'rotation of: the shaft. [6; the levers 4 submitted to the actionof 'thecam- 21 are lowered and their projections 4a are shifted downwardly inside the slopes e while they move off the plates 3iand the hooks thereon that are rigid with the batten A. They release thus said batteniA from the frame I (positionII of Fig. 6). At-the same time the cam 28 raises the lever ZB that'through the transmission 29a controls the movement of the cradletila of the magazine or holder 3'9ot full'shuttlesand produces the'beginning downward'movement of the next shuttle toward the box. At the end of the rearward movement of the batten A (position II, Fig. 6); the frame I is completely released with reference to thebat ten and the frame 'l underthe action of the levers-'4 lcontrolled by the cam 21 and cooperatingwith the slopes 9 has moved slightly: away from the-frame lithrough a relative rocking of the two frames round the axis 8; The front wall B'ofthe shuttle box has thus moved slightly away from .the rear wall lb and the full spare-shuttle 48" has begun moving-downwardly towards the box.

During the secondhali revolution of the crankshaft of the loom, the batten'A movesforwardly with its extension 3a'35 and leaves the frame i (Fig; 11 and position II of Fig. 7) p The levers dlcontrolled by the cam 21"continue moving downwardly with their projections 4a moving along the slopes 9 of the'frontfram'e 1"- and open the box B through the amount required.

for. allowing an unrestricted introductio'nof-the full shuttle 22 between-the walls I6 and 6'- of said box: The cam 28 continues controlling the downward movement of the shuttle 42' th'at drops on to the bottom of the box formed in frame I. In the meantime the cam '22 has raised the translation controlling arm 23 that urges the lever st of'the'sensing mechanism into its original starting position (Fig. 4) During the third-half revolution of the crank-shaft, the batten A and its extension 3a#--3b'-35 return rearwardly,

Under the action of the cam 21, the projections" 5 ofthe extension 3a, of the batten. During this half revolution the exhausted shuttle-4i -"-hasbeen' urged'forwardly by the picker sticlr towards the opposite side of the loom and thecradle 39acarryingrthe full shuttle 42 has been'held against thebottom-lc of the box B.

During thefourth half revolution of the crank shaft, the extension of the batten returns forwardly; The hooks 50f the, fittingsriorming. an

extension of the batten engage the crank pins 411/ on the levers t and the batten carriesalong with:

it the hame i but with a lagosuchthat. the box.

B. is no longer in alignment withtheibatten; the

shoe-4010f the open boxrlying; in its steadsinxsaid messes-7e isl'ies-its completefrevolution;thecam 28 provides for a downward-movement of the lever 29' controlling the shuttle holder while-the cradles-19a that formerly carried the full shuttle arereleased throughithe iorward movement of the frame" I 5 and pass -through the openings lg in the rear wall l Atthe same ti'me; the notchd of' the locking disc 25 has -arrived in -front 'of' the stud ZS- and under the aetion of the spring 3f; the shaft IE is urgedtowardsthe right hand side y otthetloom in the direction-of "the arrow zci 55 tion vg F-ig. 10);

The: cams; 2'! and 28 can now- -nolongerreach the levers i and 2 9-; At the end of the forward -stroke .of thebatt'en, theframe l-carried' along by its inertiacatches up the batten (Fig: 13 and posi- Thelvers- 4 under the action of a sprin g that is not illustrated rise completely and hold the frame I 'fa'st against the extension of thebatten-while the wall- 6 of*the outerbox is heldenergetically between the framed and 1 the b attemu- During this-= last-operation, the extension. 3a of the batten engages-partly under the shoe-l0 and the -.open -box -3b is positioned underneath'atheaempty shuttle- 41 3 At the same time; the extension of the -batten---'-causes-' the lever M to rock whereby the coverfl 'also-is released and 4e .The-aenlarged portion 15-t0whichthelever l4 allows .thewempty shuttle that is not completely heldiby the shoe lit-to rockand'to pass throughthebo-x 3b and out of the-same into a receiving baskets.

iszsecured hast-for its ob-ject-to providean'easier ](Engagement of the empty shuttle inside the open iOXiw What-:1 iclaim' is:

lien; automatic shuttle changing apparatus means for returning "the; shuttle b'ox rearwardly of the' extreme rear-position of the batten; a holder for substitute full shuttles registering ,with said.

rear positionoftheshuttle box rearwardly of the rear position of' the batten, means for disconnecting the shuttle box from the'batten; when the shuttle thereinis substantially empty; means for.

holding the shuttlebox" in register with said holder font simttle: changing and" means 1 for reengaging.

the shuttle box wi-ththe'batten when' the latter executeda complete reciprocating movement. after disengagement.-

2; automaticshuttle changing apparatus" foriweavinglo'oms comprising abatten, a rocking shaft for-said-batten;a frarne pivotally secured to 55 said shaft side by side withthe. batten in the longitudinal-directionof the shaft; a shuttle box.

formed at th--upper=part-0fsaid; frame' and including a; front 1 wall pivotally, secured to. the

frameb'ody; a holder for substitute full"shuttles.- registering: with saidrearposition'of the shuttle,

register: with saicl holder for shuttle changing and means for reengaging the shuttle box with the batten when the latter has executed a complete reciprocating movement after disengagement. I

3. An automatic shuttle changing apparatus for weaving looms comprising a batten, a rocking shaft for said batten, a frame pivotally secured to said shaft side by side with the batten in the longitudinal direction of the shaft, a shuttle box formed at the upper part of said frame and including a front wall pivotally secured tothe frame body, a holder for substitute full shuttles registering with said rear position of the shuttle box rearwardly of the rear position of the batten, a weft feeler carried by the pivoting frame, means whereby the operation of the weft feeler disconnects the shuttle box and frame from the batten, means for holding the shuttle box in register with said holder for shuttle changing and means for reengaging the shuttle box with the batten when the latter has executed a complete reciprocating movement after disengagement.

4. An automatic shuttle changing apparatus for weaving looms comprisinga batten, a rocking shaft for said batten, a frame pivotally secured to said shaft side by side with the batten in the longitudinal direction of the shaft, a shuttle box formed at the upper part of said frame and including a front wall pivotally secured to the frame body, a holder for substitute full shuttles registering with said rear position of the shuttle box rearwardly of the rear position of the batten, a

lever system adapted to move between a position for which it secures the frame to the batten and simultaneously holds the front wall of the shuttle box in its closing position and a release position for which the shuttle box frame is released with reference to the batten and the shuttle box front wall is open, a cam and slideways on the front wall of the shuttle box cooperating with the lever system for controlling the position of said system, means for rendering said cam operative when the shuttle in the box is substantially empty and means for automatically changing the shuttle in the shuttle box when the frame is disconnected from the batten.

5. An automatic shuttle changing apparatus for weaving looms comprising a batten, a rocking shaft for said batten, a frame pivotally secured to said shaft side by side with the batten in the longitudinal direction of the shaft, a shuttle box formed at the upper part of said frame and including a front wall pivotally secured to the frame body, a holder for substitute full shuttles registering with said rear position of the shuttle box rearwardly of the rear position of the batten, a lever system adapted to move between a position for which it secures the frame to the batten and simultaneously holds the front Wall of the shuttle box in its closing position and a release position for which the shuttle box frame is released with reference to the batten and the shuttle box front wall is open, a cam and slideways on the front wall of the shuttle box cooperating with the lever system for controlling the position of said system, a weft feeler carried by the frame, a shaft rotatably carried by the frame carrying the abovementioned cam, means for causing said shaft to rotate at a speed corresponding to one revolution for two reciprocations of the batten, complementary cams keyed to said shaft controlling respectively the operation of the weft feeler, and the feeding of a substitute shuttle from the shuttle holder to the shuttle box, a cam on the camshaft adapted to provide for a longitudinal shifting of the camshaft under the action of the weft feeler, the cams controlling the levers connecting the frame with the batten and theoperation of the holder being operative only when the shaft is in its longitudinally shifted position. f V ,1

6. An automatic shuttle changing apparatus for weaving looms comprising a batten, a rocking shaft for said batten, a frame pivotally secured to said shaft side by side with the batten in the longitudinal direction of the shaft, a shuttle box formed at the upper part of said frame and including a front wall pivotally secured to the frame body, a holder for substitute full shuttles registering with said rear position of the shuttle box rearwardly of the rear position of the batten, a lever system adapted to move between a position for which it secures the frame to the batten and simultaneously holds the front wall of the shuttle box in its closing position and a release position for which the shuttle box frame is'released with reference to the batten and the shuttle box front wall is open, a cam and'slideways on thefront wall of the shuttle box cooperating with the lever system for controlling the position of said system, a weft feeler carried by the frame, a shaft rotatably carried by the frame carrying .the abovementioned cam, means for causing said shaft to rotate at a speed corresponding to one revolution for two reciprocations of the batten, complementary cams keyed to said shaft controlling respectivelythe operationof the weft feeler, and the feeding of a substitute shuttle from the shuttle holder to the shuttle box, a cam on the camshaft including a lateral boss, a linkage controlled by the weft feeler and adapted to engage the path of said boss when the feeler has sufficiently engaged a shuttle in the shuttle box for constraining the boss and therewith the corresponding cam and cam shaft to be shifted longitudinally, the cams controlling the levers connecting the frame with the batten and the operation of the holder being operative only when the shaft is in its longitudinally shifted position.

7. An automatic shuttle changing apparatus for weaving looms comprising a batten, a rocking shaft for said batten, a frame pivotally secured to said shaft side by side with the batten in the longitudinal direction of the shaft, a shuttle box formed at the upper part of said frame and including a front wall pivotally secured to the frame body, a holder for substitute full shuttles registering with said rear position of the shuttle box rearwardly of the rear position of the batten, a lever system adapted to move between a position for which it secures the frame to the batten and simultaneously holds the front wall of the shuttle box in its closing position and a release position for which the shuttle box frame is released with reference to the batten and the shuttle box front wall is open, a cam and slideways on the front wall of the shuttle box cooperating with the lever system for controlling the position of said system, a weft feeler carried by the frame, a shaft rotatably carried by the frame carrying the abovementioned cam, means for causing said shaft to rotate at a speed corresponding to one revolution for two reciprocations of the batten, complementary cams keyed to said shaft controlling respectively the operation of the Weft feeler, and the feeding of a substitute shuttle from the shuttle holder to the shuttle box, a cam on the camshaft including a lateral boss, a linkage controlled by the weft feeler and adapted a et-s 9 s11 tor-usa themath sofsaidfibossiwhen .thefeeler has suffic'ientlyien aged;a;shutt1e:imtheshuttle ho :v for. constraining the boss-L and therewith the voorresnonciing-. cam (and -camshaft ,toihelshif-ted en imdinally, .the ;cams icontrollmg the 1e=.vers .oonneoting Ithe-irame with gthembatten and ithe operation of the'holder being operative omytwhen liheshaft isiiniits longitudinally shifted position, a-mecha nismV- carried-Joy .the frame for locking theshnttle-inside .theshutfle box, andfiaeam on the camshaft cpntrollingnsaidmechanism.

.i8.;,An.automatic shuttle .chang'ing apparatus for wearing looms, comprising a batten, a rocking shaft'imrsaid,battenragiramefpivotally secured to .said.;shalftgsideeby isidemwith-Hthe batten in the 'lo gitudinal hireetionof; the shaft, :a shuttle Juox formed 1111-. the supnerinart .ofsaid. frame andl ineluding a'gfrontwallpivotally secured to .the frame bodywajiholder ioresubstitute 11111 shuttles .a registering with saidrear positionof. .theishuttle {box rearwardly or the rear .,position .vo'fjthe; batten a leti risystem adaptediomovebetweena position I01 whih .itsecllresitheifmme .to ntheuhatten and simultaneously holds the front, wall ,of.,.the shuttle bhx; injits closing position s ands-a .irelease ,position for Whichtheshuttlahox 'frameiis-ereleased with liefeltencetojthelbattemandihe shuttlejoox front mallelsi open, a loam andmidewaysfon Jthejront mallofltlm shuttle hoxieooperating with thelever system for oontrollingithe positioned-said system, apweit;feelerearrieoebyjthe. irame a shaftmotam ably harried by the frame carrying QtheTabQVementioned cam, means for. causing saidmshaft to mtateiateaespeed correspondingitovone revolution 12 .fontwo reciproeationspfsthe.hatten; complementaryt cams keyed to said: shaft :controlling respectiyelyithe. operation of the weft; feeler,.and ithe feeding of a substitute shuttle from the shuttle holderutoethe. shuttle box, racam nnthe. camshaft including ailateralIboss,v a; linkage l-controlled by .theweft'feelerand adapted to en a e" the path of saidiboss whenthe .feeler. has Isufiiciently engaged a shuttle inzzthexslmttlewbox for-.oonstrainmg'the boss and therewith the corresponding tcamzand camshaft to the ishiftedilongitudinally, v.the cams oontrollmg .theileyers. connecting the framewwith thee-batten; and ,theioperation of'ethe holder being operative vnnlyewhennthex shaft" is;in its .longitudi nallywshifted position a mechanism carried by the frame forloeking ..the..shutt1e.,inside the. shuttle b011,: andia cam one-themamshaft controlling said mechanism .and..--a ecamenn the camshaft for returningsaid .fee1er 'linkag-e .into its normal inoperative position.

ACHILLE BUTIN.

REFERENCES CITED ":Thefollowingmeierences zare of :record in the file' of :this :patent "UNITED QSTATES :PATENII'S 508,-7-14 GreatsBritaminun-J111y55,,1939 

